Species of Root-Knot Nematodes (Meloidogyne spp.) Infecting Soybean in Different Localities of Egypt and Rating of its Local Genotypes for their Resistance to Meloidogyne incognita
Species of Root-Knot Nematodes (Meloidogyne spp.) Infecting Soybean in Different Localities of Egypt and Rating of its Local Genotypes for their Resistance to Meloidogyne incognita
Ahamed Mohamed Korayem, Moawad Mohamed Mohamed* and Mohamed and Mostafa Mohamed Attia Hamman
ABSTRACT
Survey and identification of root-knot nematode species infecting soybean grown in six Egyptian governorates; Beni-Suef and Menia representing middle Egypt and Alexandria, El-Beheira, Kafr-Elsheikh and Dakahlia representing northern Egypt, was conducted during the growing season 2020. A total of 100 root samples were collected and processed for identification of root-knot nematode species. Data revealed the presence of three root-knot nematode species, they were Meloidogyne incognita, M. javanica and M. arenaria. The former species was the most frequent (58.8%) followed by M. javanica (31.9%) and M. arenaria (9.4%). Six Egyptian soybean cultivars; Giza-21, Giza-22, Giza-35, Giza-82, Giza-83 and Giza-111 were evaluated for their resistance to M. incognita. Data indicated that all cultivars were susceptible to the nematodes based on the nematode damage (root-gall index) and the rate of nematode reproduction (Rf).
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